Srikar Chamarthy
03/31/2026, 1:35 PMkapa.ai
03/31/2026, 1:35 PM400 Bad Request on the Apple OAuth token endpoint (https://appleid.apple.com/auth/oauth2/token) typically indicates an issue with your OAuth credentials rather than a connector bug.
Here are the most likely causes and steps to resolve it:
1. Invalid or mismatched credentials: Ensure your Client ID and Client Secret are correct and were generated together from the same Apple Ads API user role. [Apple Search Ads setup]
2. Re-generate your credentials: Try creating a new API user role and re-implementing OAuth for your API user via the Apple Search Ads OAuth guide, then update your Airbyte connector configuration with the fresh Client ID and Client Secret. [Apple Search Ads setup]
3. Connector version: Make sure you are using a recent version of the source-apple-search-ads connector. There was a known issue where the connector needed to be updated from API v4 to v5 (Apple Search Ads API v4 was sunset on February 11, 2025). If you are on an older version, upgrading the connector may resolve authentication issues. [v5 update required]
If after re-generating your credentials and updating the connector the error persists, the knowledge sources do not contain further specific details about this exact token endpoint error beyond credential misconfiguration. đ 0 button đ 0 button âšī¸ Tip: Mention @kapa.ai in the thread for follow-ups or DM the app for 1-to-1 help.